Thanks to Hiro for pointing this out to me: History of the browser user-agent string.
In the beginning there was NCSA Mosaic, and Mosaic called itself NCSA_Mosaic/2.0 (Windows 3.1), and Mosaic displayed pictures along with text, and there was much rejoicing.
I’m currently getting ready to go do some volunteering in my son’s 5th grade class, teaching them some basic Web stuff, and thinking back to those early days has me feeling nostalgic. Anyway, I really liked this. It builds to a nice climax.